WO2012061923A1 - Orthodontic debonding tool, tool insert and method for removing orthodontic brackets - Google Patents
Orthodontic debonding tool, tool insert and method for removing orthodontic brackets Download PDFInfo
- Publication number
- WO2012061923A1 WO2012061923A1 PCT/CA2011/001199 CA2011001199W WO2012061923A1 WO 2012061923 A1 WO2012061923 A1 WO 2012061923A1 CA 2011001199 W CA2011001199 W CA 2011001199W WO 2012061923 A1 WO2012061923 A1 WO 2012061923A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tool bit
- tool
- adhesive
- orthodontic
- cutting
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/02—Tools for manipulating or working with an orthodontic appliance
- A61C7/023—Tools for manipulating or working with an orthodontic appliance for debonding or removing orthodontic devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
- A61C1/07—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with vibratory drive, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
- A61C7/14—Brackets; Fixing brackets to teeth
- A61C7/16—Brackets; Fixing brackets to teeth specially adapted to be cemented to teeth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
- A61C3/03—Instruments operated by vibration
Definitions
- the present invention relates generally to dentistry and, in particular, to techniques and devices for removal of orthodontic brackets.
- brackets are generally made of polycarbonates or ceramics where the latter are either monocrystalline or polycrystalline. Since adhesion of brackets is considered semi-permanent in orthodontics, bond strength should be sufficiently high to resist accidental debonding during the entire course of treatment but low enough so that excessive force is not needed when debonding the brackets after treatment. The major concern during bracket debonding is the risk of enamel damage, as reported by the European Journal of Orthodontics in 2008.
- Embodiments disclosed herein provide a tool, tool insert and method for removing orthodontic brackets that obviate or mitigate at least some of the aforementioned disadvantages.
- the present invention provides an orthodontic debonding tool, tool bit (or tool insert) for said tool, and a related method of debonding orthodontic brackets.
- This invention constitutes an innovative solution to the problem of removing orthodontic brackets and the related problem of removing excess adhesive from the teeth without damaging the enamel of the teeth while also reducing chair-side time.
- a tool bit (or tool insert) for removing orthodontic brackets comprises a handpiece-engaging portion (or handpiece-interface portion), a curved portion connected to the handpiece-engaging portion, and a working end connected to the curved portion.
- the working end has at least one beveled cutting surface for cutting an adhesive that bonds the orthodontic brackets to respective teeth and at least one blunt or flat polishing surface for polishing away any residual adhesive that remains after the orthodontic brackets have been removed.
- Cutting surfaces and the blunt polishing surface may be coated with abrasive material such as diamond grit. Edges of the beveled cutting surfaces may be serrated.
- an orthodontic debonding tool comprises an ultrasonic handpiece, e.g. a piezoelectric hand piece and a tool bit connected to the ultrasonic handpiece.
- the tool bit includes a curved portion connected to the handpiece-engaging portion, and a working end portion connected to the curved portion.
- the working end portion includes a front edge having a first beveled surface and a first side edge having a second beveled surface.
- a method for debonding orthodontic brackets that are bonded to teeth with an adhesive entails connecting a tool bit to an ultrasonic handpiece, ultrasonically vibrating the tool bit, cutting the adhesive using a cutting surface of the tool bit to remove the brackets, and polishing away any remaining adhesive using a flat or blunt surface of the tool bit.
- Figure 1 is a perspective view of a tool bit for removing orthodontic brackets in accordance with an embodiment of the present invention
- Figure 2 is a top plan view of the tool bit shown in Figure 1 ;
- Figure 3 is a side elevation view of the tool bit shown in Figure 1 ;
- Figure 4 is a cross-sectional view of the tool bit shown in Figure 1 ;
- Figure 5 is a frontal elevation view of the tool bit shown in Figure 1 ;
- Figure 6 is a partial top plan view of the end portion of the tool bit shown in Figure 2;
- Figure 7 is a bottom plan view of the tool bit shown in Figure 1 ;
- Figure 8 is a partial bottom plan view of the end portion of the tool bit shown in
- FIGS 1 to 5 illustrate a novel tool bit for removing orthodontic brackets in accordance with an embodiment of the present invention.
- the tool bit 10 which is also referred to herein as a "tool tip”, “tool insert” or simply “insert"
- the handpiece-engaging portion 12 may be connected to the handpiece by threads, quick-connect or any other suitable means of mechanical connection.
- the curved portion 16 provides sufficient offset to present the end portion in a substantially co-planar relationship with a tooth surface.
- the working end portion 18 has at least one cutting surface for cutting or abrading away adhesive that bonds the bracket to the tooth and at least one polishing surface for polishing away any residual adhesive that may remain after the bracket has been removed.
- the working end portion 18 includes a number of cutting edges or cutting surfaces designed to cut away the adhesive that bonds the orthodontic brackets to the surface of the teeth.
- the working end portion 18 includes a front edge 20, a first side edge 22, a top (upper) surface 24, and a second side edge 26.
- the front edge 20 and the first side edge 22 are designed to cut and abrade the adhesive.
- the second side edge 26 is a blunt surface designed to polish the tooth to remove any remaining adhesive after the bracket has been detached from the tooth.
- the tool bit also includes a cooling fluid delivery port
- the cooling fluid delivery port directs cooling fluid (e.g. water) onto the cutting surfaces/edges of the working end of the tool bit to cool and clean the working end of the tool bit during operation.
- the fluid flow in the embodiment depicted in the drawings may be varied from its current design. In other words, the flow direction may be changed, internal or external fluid sources may be employed, the flow rate may be increased or decreased, and any additive may be added to the fluid to increase, e.g. to improve the cooling efficiency or for other reasons.
- the tool bit 10 includes a front beveled cutting surface 32 and a side beveled cutting surface 34. These surfaces may be coated with an abrasive particle such as diamond grit.
- the front beveled cutting surface 32 may have, as shown, a serrated front edge 20.
- the side beveled cutting surface 34 may also have a serrated side edge 22.
- the front edge 20 and the first side edge 22 are the edges of abrasive-coated beveled surfaces 32 and 34, respectively. As shown by way of example in Figure 6, these surfaces 32 and 34 have serrated edges.
- beveled surfaces 32 and 34 and the top (upper) surface 24 are coated with an abrasive material such as, for example, diamond grit, tungsten carbide particles or any other hard abrasive particle.
- abrasive material such as, for example, diamond grit, tungsten carbide particles or any other hard abrasive particle.
- Abrasive beveled surfaces 32 and 34 provide for abrasive cutting, i.e. by abrasion.
- the abrasive material includes diamond grit.
- a diamond particle size of 40 microns (i.e. a grit mesh size of 400) is believed to work well, although diamond grit of other particle sizes may be utilized.
- the second side edge 26 (which is not serrated in the illustrated embodiment) is also coated with an abrasive material such as diamond grit (although in other embodiments, it need not be coated with an abrasive).
- abrasives or grit may be utilized.
- Figures 7 and 8 there is illustrated in a bottom plan view and partial view the tool bit of Figures 1 to 6.
- Figures 7 and 8 show a flat and smooth undersurface 30 with adjacent serrated, abrasive-coated, beveled surfaces 36 and 38.
- the smooth flat undersurface 30 is masked during the abrasive coating process so no abrasive material is adhered to this undersurface 30.
- the undersurface 30 is made smooth to avoid damaging the enamel of the
- this undersurface 30 provides relief to a tooth surface from abrasive beveled surfaces 36 and 38 used to remove the adhesive layer bonding the bracket to the tooth.
- the tooth surface (enamel) is safely distanced from the abrasive surfaces.
- the cutting surfaces and the blunt polishing surface may be coated with abrasive material such as diamond grit or any
- the tool bit 10 is inserted into a handpiece of an ultrasonic unit, e.g. a piezoelectric handpiece, although the bit could, in other embodiments, be shaped and dimensioned to connect to an air scaler, electric scaler, sonic device, or any other mechanical, electrical or electro-mechanical patient-application device.
- the ultrasonic unit transmits ' vibrations through the handpiece to the tool bit 10 to facilitate a cutting action at the front and first side edges 20 and 22.
- Abrasive beveled edges 32, 34, 36 and 38 wear away the adhesive layer bonding the bracket to the tooth, while the smooth undersurface 30 ensures that the tooth enamel is protected from the abrasive surfaces.
- the blunt side surface 26 (which may or may not be coated with an abrasive) may be used for polishing the tooth to remove any remaining adhesive from the surface of the tooth after the orthodontic bracket has been removed.
- the combination of the two sets of serrated edges 32 and 34 together with 36 and 38 provide a fine edge for entry into the adhesive layer.
- the tool bit 10 may be made of surgical stainless steel (e.g. stainless steel 316L).
- the tool bit 10 may be made of titanium or any other suitable material that is capable of transmitting the ultrasonic vibrations from the handpiece to the working end 18 of the tool bit 10.
- the handpiece-engaging portion 12 i.e. handpiece-interfacing portion
- the fluid delivery port may also be eliminated where an external fluid delivery system can be attached to the tool bit and/or handpiece.
- the cutting surfaces/edges 20, 22 are serrated.
- these serrations may be parallel to a longitudinal axis of the shank 18 of the tool bit 10.
- This "rake angle" i.e. the angle between the serrations and the longitudinal axis in the illustrated embodiment is thus zero (since the forward-facing serrations are parallel to the longitudinal axis).
- the rake angle may be varied to achieve other effects.
- the tool bit 10 may also be constructed without any serrations at all. In that case, all cutting action is performed by the abrasive particles. In such an embodiment, the abrasive grit size may be varied (e.g. increased). Furthermore, in another embodiment, the tool bit may have only a subset of the serrated edges that are shown in the > preferred embodiment, e.g. only the front edge 20 or only the first side edge 22.
- the "shank angle" i.e. the angle of the shank 18 relative to the handpiece-engaging portion 12 and the shaft portion 14, may also be varied.
- the shank angle is zero since the shank is parallel to the handpiece- engaging portion 12 and the shaft portion 14.
- Other shank angles may be desirable for achieving different effects.
- the shank-to-tip angle may be varied from what is shown by way of example in the illustrated embodiments to achieve different effects.
- a right-handed tool bit is depicted in the drawings. As shown, the serrated edge
- a left-handed tool bit may be constructed with a serrated edge along the left side of the tool bit (for left-handed dentists).
- the debonding tool (to be attached to the ultrasonic hand piece available in the market) includes an ultrasonic handpiece for ultrasonic vibration of the novel tool bit.
- the novel tool bit comprises (as described above), the tool- engaging portion, shaft portion, and working end.
- the working end, or shank includes one or more cutting surfaces and/or edges that cut away the adhesive to detach the brackets from the teeth. These cutting surfaces/edges may be abrasive-coated and/or serrated, as described above.
- At least one surface of the tool bit is a polishing surface.
- the flat smooth bottom surface 30 protects the adjacent enamel of the tooth when the tool is used to pry an orthodontic bracket from the tooth.
- Yet another aspect of the invention is a novel method of debonding orthodontic brackets using the novel tool bit described above.
- This method entails connecting a tool bit to an ultrasonic handpiece and then ultrasonically vibrating the tool bit (activating the handpiece or an ultrasonic unit connected to the handpiece). This causes the tool bit to oscillate at an ultrasonic frequency.
- the frequency may be controlled using a controller.
- the method then entails cutting adhesive (that bonds the orthodontic brackets to the teeth) using one or more cutting surfaces and/or cutting edges of the tool bit to thereby remove the brackets. Once the brackets have been removed, there will usually be some residual adhesive on the teeth.
- the method thus entails a further step of polishing away any remaining adhesive using a smooth surface of the same tool bit.
- the invention provides a single tool bit that can be used to both remove (detach) the bracket and also polish the tooth. This invention not only reduces the likelihood of enamel fracture and/or of a bracket breaking during removal but also reduces the total time required to remove the brackets from the teeth. This also reduces the discomfort for the patient. As will be appreciated, the quicker and more effective bracket removal is highly
- this tool may enable the dentist to assign the task to the orthodontic hygienist (once approved by the clinic or if permissible under local dentistry regulations) as most orthodontic hygienists are already familiar with similar equipment for their hygiene practice.
- the tip depicted by way of example in the drawings was designed for and successfully tested
- a piezoelectric ultrasonic device providing linear erasure-type motion although other types of motion may be employed.
- a magnetostrictive ultrasonic device providing an elliptical figure-eight motion may be employed.
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/510,001 US8956159B2 (en) | 2010-11-09 | 2011-10-28 | Orthodontic debonding tool, tool insert and method for removing orthodontic brackets |
AU2011326289A AU2011326289A1 (en) | 2010-11-09 | 2011-10-28 | Orthodontic debonding tool, tool insert and method for removing orthodontic brackets |
EP11827795.3A EP2473131B1 (en) | 2010-11-09 | 2011-10-28 | Orthodontic debonding tool and tool bit for removing orthodontic brackets |
BR112013011524A BR112013011524A2 (en) | 2010-11-09 | 2011-10-28 | orthodontic detachment tool, tool insert and method for removing orthodontic brackets |
CN2011800603003A CN103313676A (en) | 2010-11-09 | 2011-10-28 | Orthodontic debonding tool, tool insert and method for removing orthodontic brackets |
JP2013538010A JP2014500064A (en) | 2010-11-09 | 2011-10-28 | Orthodontic stripping tool, tool insert, and method for removing orthodontic bracket |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2720442A CA2720442C (en) | 2010-11-09 | 2010-11-09 | Orthodontic debonding tool, tool insert and method for removing orthodontic brackets |
CA2,720,442 | 2010-11-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2012061923A1 true WO2012061923A1 (en) | 2012-05-18 |
WO2012061923A8 WO2012061923A8 (en) | 2012-07-12 |
Family
ID=46050159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2011/001199 WO2012061923A1 (en) | 2010-11-09 | 2011-10-28 | Orthodontic debonding tool, tool insert and method for removing orthodontic brackets |
Country Status (8)
Country | Link |
---|---|
US (1) | US8956159B2 (en) |
EP (1) | EP2473131B1 (en) |
JP (1) | JP2014500064A (en) |
CN (1) | CN103313676A (en) |
AU (1) | AU2011326289A1 (en) |
BR (1) | BR112013011524A2 (en) |
CA (1) | CA2720442C (en) |
WO (1) | WO2012061923A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2018078831A1 (en) * | 2016-10-28 | 2019-09-05 | オリンパス株式会社 | Ultrasonic device |
Families Citing this family (10)
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US20120059247A1 (en) * | 2010-09-03 | 2012-03-08 | Speeg Trevor W V | Echogenic needle for biopsy device |
CN105455908A (en) * | 2015-11-24 | 2016-04-06 | 宁波爱优恩商贸有限公司 | Bracket removing pliers |
US9687316B1 (en) | 2016-06-10 | 2017-06-27 | Sami Maassarani | Dental covering removal tool |
USD820451S1 (en) * | 2017-01-26 | 2018-06-12 | American Eagle Instruments, Llc | Dental scaler |
USD825757S1 (en) * | 2017-02-11 | 2018-08-14 | Kelly Lee Pirtle | Apparatus for removing an intraoral device |
US11076934B2 (en) | 2018-01-29 | 2021-08-03 | Sami Maassarani | Dental tool assembly |
US11291527B2 (en) * | 2018-09-28 | 2022-04-05 | IDM Tooling, LLC | Tool for seating an orthodontic aligner and method of using same |
USD910176S1 (en) | 2019-08-06 | 2021-02-09 | IDM Tooling, LLC | Tool for seating and removing an orthodontic aligner |
US11678957B2 (en) | 2020-06-12 | 2023-06-20 | American Orthodontics Corporation | Orthodontic debonding tool |
CN111973294B (en) * | 2020-08-31 | 2022-02-18 | 郑州大学第一附属医院 | Invisible appliance picker |
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EP0037677A2 (en) | 1980-04-07 | 1981-10-14 | Minnesota Mining And Manufacturing Company | Orthodontic bracket adhesive and abrasive for removal thereof |
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- 2010-11-09 CA CA2720442A patent/CA2720442C/en not_active Expired - Fee Related
-
2011
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- 2011-10-28 AU AU2011326289A patent/AU2011326289A1/en not_active Abandoned
- 2011-10-28 JP JP2013538010A patent/JP2014500064A/en active Pending
- 2011-10-28 BR BR112013011524A patent/BR112013011524A2/en not_active Application Discontinuation
- 2011-10-28 CN CN2011800603003A patent/CN103313676A/en active Pending
- 2011-10-28 WO PCT/CA2011/001199 patent/WO2012061923A1/en active Application Filing
- 2011-10-28 EP EP11827795.3A patent/EP2473131B1/en active Active
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JPWO2018078831A1 (en) * | 2016-10-28 | 2019-09-05 | オリンパス株式会社 | Ultrasonic device |
Also Published As
Publication number | Publication date |
---|---|
EP2473131B1 (en) | 2019-01-02 |
US8956159B2 (en) | 2015-02-17 |
EP2473131A4 (en) | 2016-08-24 |
JP2014500064A (en) | 2014-01-09 |
CA2720442A1 (en) | 2012-05-09 |
CA2720442C (en) | 2013-03-19 |
EP2473131A1 (en) | 2012-07-11 |
WO2012061923A8 (en) | 2012-07-12 |
CN103313676A (en) | 2013-09-18 |
AU2011326289A1 (en) | 2013-05-30 |
BR112013011524A2 (en) | 2018-05-02 |
US20130216970A1 (en) | 2013-08-22 |
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